Advanced Nanoelectrocatalyst of Pt Nanoparticles Supported on Robust Ti0.7Ir0.3O2 as a Promising Catalyst for Fuel Cells

Developing robust catalysts is still challenging for further commercialization of low-temperature fuel cell technologies. In this study, we introduce platinum nanocatalyst loading on Ti 0.7 Ir 0.3 O 2 to assemble a robust Pt/Ti 0.7 Ir 0.3 O 2 catalyst toward the methanol oxidation reaction (MOR) in direct methanol fuel cell systems. These observational results demonstrated that the Pt/Ti 0.7 Ir 0.3 O 2 catalyst is a promising anodic electrocatalyst due to the superior electrocatalytic activity and durability toward MOR, which was exhibited from the onset potential of ∼0.1 V and high current density of ∼21.69 mA/cm 2 versus that of the state-of-the-art Pt/C (E-TEK) catalyst. We also demonstrated the electronic transfer from the Ti 0.7 Ir 0.3 O 2 catalyst support to Pt NPs resulting in the modified surface electronic structure of Pt NPs, which could be the reason for the high activity and durability of the Pt/Ti 0.7 Ir 0.3 O 2 catalyst. In addition, this approach could supply a promising potential catalyst for fuel cell technology and other applications such as solar cells, biosensors, and water splitting.